Website payment integration
Integrate payments into a custom website with hosted checkout, server verification and reliable order updates.
Payment integration services
Payment gateway integration for websites, stores and applications.
Accept online payments through a secure, verified checkout connected to your orders and business workflows. Esperto integrates suitable payment gateway APIs for custom websites, ecommerce stores and software products.
Server-side payment verificationWebhook and order-status handlingTest and production configuration
CheckoutSecure payment flow
Website
Gateway API
Settlement
Verify
Complete transaction flow
Payment integration is more than placing a button on a page.
A dependable web payment gateway flow creates a transaction from trusted server data, sends the customer through an approved checkout, verifies the response and updates the correct order only after authoritative confirmation.
We also plan failed and abandoned payments, duplicate callbacks, webhook retries, refunds, status reconciliation and the information your team needs in its admin panel. This protects the customer journey and reduces manual payment checking.
Payment integration services
Online payments matched to your platform and business model.
Ecommerce payment integration
Connect checkout and payment states with product orders, customer accounts, inventory and fulfilment workflows.
Subscriptions and recurring billing
Implement supported subscription APIs, recurring plans, mandate flows and webhook-driven billing status.
Application and API payments
Build payment gateway API workflows for web apps, mobile backends, SaaS products, marketplaces and internal systems.
Online payment platforms
Razorpay, Stripe and other provider integrations.
The right gateway depends on merchant eligibility, country, currency, platform, payment methods, recurring billing and settlement requirements.
Razorpay
Razorpay checkout, payment links or buttons, API integration, webhooks, refunds and supported subscription workflows.
Stripe
Stripe Checkout, Payment Intents, supported payment methods, subscriptions, webhooks and customer billing flows.
PayU
PayU checkout and transaction-status integration for eligible merchant accounts and agreed website workflows.
Paytm
Paytm API and checkout integration based on the merchant product, credentials and current provider requirements.
PhonePe
PhonePe payment gateway integration for approved merchant accounts, supported checkout journeys and transaction verification.
Other platforms
A suitable payment provider can be integrated after reviewing geography, currency, platform, settlement and business requirements.
Technical delivery
A payment gateway API connected to the systems behind checkout.
Our payment integration services can cover the customer interface, backend verification, webhooks, database records and administration workflow.
Gateway account and credential configurationHosted or embedded checkout implementationServer-created orders and trusted amount handlingSignature and transaction verificationPayment success, failure and pending statesWebhook processing and idempotency controlsRefund and cancellation workflowsSubscription and recurring-payment APIsCredit card payment integration through provider checkoutWooCommerce or Shopify integration reviewPayment logs and admin visibilityTest-mode validation and production launch
Integration process
From provider selection to verified production payments.
Scope
Confirm platform, provider, currency, products, transaction model and operational requirements.
Design
Map checkout, trusted server data, return states, webhooks, orders, refunds and failure handling.
Integrate
Build the frontend, payment gateway API, backend verification and administration records.
Test
Validate supported test scenarios, signatures, webhooks, retries, failures and duplicate events.
Launch
Configure production credentials after merchant activation and monitor the initial transaction flow.
Secure implementation boundary
Card data should remain inside approved provider-controlled flows.
We design integrations to avoid collecting raw card details on ordinary website forms. The chosen online payment platform, merchant account and applicable compliance obligations determine the final architecture. Esperto is an independent integration provider and does not represent or guarantee approval by Razorpay, Stripe, PayU, Paytm, PhonePe, Shopify, Zoho or other third parties.
Payment gateway integration FAQs
Questions before integrating online payments.
What is payment gateway integration?
Payment gateway integration connects a website, store or application with an online payment platform. It creates the checkout request, verifies the transaction on the server, receives status updates and records the result against the correct order or account.
Can you integrate a payment gateway into my website?
Yes. We provide payment integration in websites, web applications and ecommerce stores. The scope can include checkout, backend verification, webhooks, order status, refunds and an administration view.
Do you provide Razorpay payment gateway integration?
Yes. Razorpay integration can cover checkout, orders, signature verification, webhooks, refunds, payment buttons and supported subscription APIs according to your approved Razorpay account and project requirements.
Can you integrate the Stripe payment gateway?
Yes. Stripe payment integration can use Checkout or a suitable API flow with server-side verification, webhooks, supported payment methods, refunds and subscriptions where required.
Do you support Shopify or WooCommerce payment integration?
We can review payment gateways for Shopify and WooCommerce payment integration requirements. Availability depends on the store country, platform plan, provider app or extension, merchant eligibility and the gateway’s current support.
Can you integrate PayU, Paytm or PhonePe?
Yes, subject to merchant approval, API availability and the provider’s current technical requirements. We confirm the appropriate checkout and verification flow after reviewing the account and platform.
Does the integration include a Razorpay account or provider approval?
No. The merchant creates and owns the Razorpay account or other provider account and completes verification directly with that provider. Esperto implements the agreed technical integration but cannot guarantee approval or activation.
Are gateway charges included in the development fee?
No. Transaction fees, taxes, settlement charges, subscriptions, platform apps and other provider costs are billed under the provider’s terms unless expressly included in the written project scope.
Can you test using a Razorpay demo card?
We use the provider’s supported test environment and published test credentials or methods. Real card data must never be used in an unsecured test flow, and production transactions are subject to provider activation.
Integrate payments